开关电容型ISOP变换器电压解耦控制
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摘要
传统的双环控制输入均压环和输出电压环之间存在着耦合关系,输入均压环和输出电压环控制器参数调节会相互影响。通过引入耦合因子分析了输入均压控制与输出电压控制之间的耦合特性,提出了开关电容(SC)型输入串联输出并联(ISOP)直流变换器的电压解耦控制策略,消除了输入均压环与输出电压环相互之间的影响,有利于控制器参数的优化设计,同时采用交错移相调制方法,大大减少了输出电流纹波。最后,搭建了3模块的ISOP直流变换器的仿真模型验证了所提方法的有效性。
There exists coupling relationship between the input voltage balance loop and the output voltage loop in conventional dual-loop control,where the controller parameters of two loops would interact each other.The coupling characteristics of the loops are analyzed by introducing a coupling coefficient.And a voltage decoupling control strategy for switched capacitor(SC)input-series and output-paralleled(ISOP)direct current converter is proposed which can reduce the interacting between two loops and optimize the design of the controller parameters.At the same time,interlaced phase-shift modulation strategy is applied which can rapidly decrease the output ripple current.Lastly,the effectiveness and practicability of the proposed strategy are verified by building simulation and experiment of a threemodule ISOP converter.
There exists coupling relationship between the input voltage balance loop and the output voltage loop in conventional dual-loop control,where the controller parameters of two loops would interact each other.The coupling characteristics of the loops are analyzed by introducing a coupling coefficient.And a voltage decoupling control strategy for switched capacitor(SC)input-series and output-paralleled(ISOP)direct current converter is proposed which can reduce the interacting between two loops and optimize the design of the controller parameters.At the same time,interlaced phase-shift modulation strategy is applied which can rapidly decrease the output ripple current.Lastly,the effectiveness and practicability of the proposed strategy are verified by building simulation and experiment of a threemodule ISOP converter.
引文
[1]陈珩.电力系统稳态分析(第4版)[M].北京:中国电力出版社,2007.
[2]Boon Teck Ooi,Wang X.Boost-type PWM HVDC Transmission system[J].IEEE Trans.on Power Delivery,1991,6(4):1557-1563.
[3]汤广福,罗湘,魏晓光.多端直流输电与直流电网技术[J].中国电机工程学报,2013,33(10):8-17,24.
[4]徐殿国,刘瑜超,武健.多端直流输电系统控制研究综述[J].电工技术学报,2015,30(17):1-10.
[5]王子龙,肖岚,赵鹏.全桥直流变压器/变换器ISOP组合式系统的研究[J].中国电机工程学报,2014,34(33):5819-5826.
[2]Boon Teck Ooi,Wang X.Boost-type PWM HVDC Transmission system[J].IEEE Trans.on Power Delivery,1991,6(4):1557-1563.
[3]汤广福,罗湘,魏晓光.多端直流输电与直流电网技术[J].中国电机工程学报,2013,33(10):8-17,24.
[4]徐殿国,刘瑜超,武健.多端直流输电系统控制研究综述[J].电工技术学报,2015,30(17):1-10.
[5]王子龙,肖岚,赵鹏.全桥直流变压器/变换器ISOP组合式系统的研究[J].中国电机工程学报,2014,34(33):5819-5826.